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PLC是自动控制应用中一种非常重要的器件,PLC作为一种即时系统有别于个人电脑,传统式以继电器为主的电机控制系统中, 每当变更设计时,整个系统几乎都要重新制作, 不但费时又费力;同时由於继电器还有接点接触不良、磨损、体积大之缺点, 因此造成成本升高、可靠性低、不易检修等问题.为了改善这些缺点,美国DEC在1969年首度发表:可编程控制器(Programmable Controller)。
可编程控制器在发表初期被称为(Programmable Logic -Controller)简称PLC, **的目的是取代继电器,从而执行继电器逻辑及其他计时或计数等功能的顺序控制为主, 所以也称顺序控制器,其结构也像一部微电脑,所以也可称为微电脑可程式控制器(MCPC)。
BALLUFF LIMIT SWITCH BNS-819-D04-R12?-62 NNB
IFM EFECTOR 500 PRESSURE SENSOR PN7809 PN-001BRBR18-QF?R...
SICK LIGHT CURTAIN 24 VOLTAGE FGSE 900-211
GEMS SENSORS 156268 BSPP-RS TYPE RFS, NNB
MINI SAFE MS4300 SERIES SAFETY LIGHT CURTAIN RECEIVER ...
ALLEN BRADLEY 8-24VDC INCREMENTAL ENCODER 845H-SJJK22CF..?.
COMPTROL TENSION CELL BLOCK BB30S12.6K-1337
BEI TECHNOLOGIES INDUSTRIAL ENCODER 924-01002-9714
DYNAPAR 3/8" SHAFT ROTARY ENCODER A2540960000
CHO-ONPA SONICS ULTRASONIC TRANSDUCER 49BPZ1B-10
CHO-ONPA SONICS ULTRASONIC TRANSDUCER 49BPZ1C-02
CHO-ONPA SONICS ULTRASONIC TRANSDUCER 49BPZ1B-08
HOMMEL-ETAMIC 116538A
SCHNECK TRANSDUCER T19-W
HEIDENHAIN ROTARY ENCODER ROD 413 2048 01
DYNAPAR ROTOPULSER ROTARY TRANSDUCER 62-CAEF-0600-A-?0-0...
EATON CUTLER-HAMMER E57LAL12A2SA SERIES E1 3-PIN PROXIM...
MKS INSTRUMENTS TYPE 122A PRESSURE TRANSDUCER 122AA-000...
TEMPOSONICS 24VDC 0060MM STROKE 5-PIN POSITION SENSOR, ...
GENERAL ELECTRIC DS-64 THREE STATOR KILOWATT HOUR METER...
MANNING SYSTEMS NH3 0/100 PPM ATMOS EQUIPPED SENSOR EC-...
UNITED ELECTRIC CONTROLS 10-100 PSI PRESSURE SWITCH J12...
REVERE TRANSDUCER HPS TRANSDUCER CLASS D3-10P5/W/PL/K /...
ALLEN BRADLEY 70-264V DC/DC PHOTOSWITCH 42GTU-9202-QD S...
REVERE TRANSDUCERS 30KG HPS TRANDUCER CLASS D3 / KRUPPS
SICK PHOTOELECTRIC SAFETY SWITCH WSU26/2-230 *NIB*
ENCODER PRODUCTS INCREMENTAL SHAFT ENCODER 725I-R-OC
ALLEN BRADLEY RESOLVER FEEDBACK MODULE 1326AB-MOD-VC 42...
STI MINISAFE-B MS4300B-2 SERIES TRANSMITTER / RECEIVER ...
STI MiniSafe LONG RANGE MS4400 LIGHT CURTAIN EMITTER 42...
SICK LIGHT CURTAIN MGSS75-12
SICK LIGHT CURTAIN MGSE75-12A
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